## References * F. Chapoton, operads and algebraic combinatorics of trees, [pdf](http://emis.matem.unam.mx/journals/SLC/wpapers/s58chapoton.pdf) * Thompson's group $F$ * [Thompson groups, in wikipedia](http://en.wikipedia.org/wiki/Thompson_groups) * Marcelo Fiore, Tom Leinster, An abstract characterization of Thompson's group F, [ arXiv:math/0508617](http://arxiv.org/abs/math/0508617)